Echinoderma asperum

Suprapellis formed by broad, short catenulate hyphae, constricted at the septa, with brown intracellular pigment. Below this, narrower filamentous hyphae with faint brown intracellular pigment, with clamped septa.

Lamellar edge sterile, completely covered with subglobose to pyriform hyphae acting as cheilocystidia, up to 40 µm long and 17 µm wide.

Basidia cylindrical, up to 18 µm long, with basal clamp connections, 4-spored.

Spores elongated, cylindrical, slightly fusiform, smooth, hyaline, thin-walled, with a prominent lateral apiculus at one end and an intense dextrinoid reaction in Melzer's reagent.